Good afternoon, everyone.I am developing a program to record the total number of hours the pump is running, in order to assist with preventive maintenance planning. The current code can already sum the operating time whenever the pump is started. However, I need to implement an additional feature: when the program starts, it should read the previously accumulated value from a file. This way, when the pump is turned on again, the system will continue counting from that value, adding the new operating time. When the pump is turned off, the updated value should be saved to the file, ensuring that the total running hours are preserved for the next execution.

Hi Felipe, @Felipe_Alves17 wrote: Did this image look better? Nope, still backward wires!!! See this as a suggestion: When you close a file then you cannot use its reference in the next iteration! Solution: open the file again… All wires going from left to right: did you ever read the style guide in the LabVIEW hellp??? As noted in the image: you need to implement error handling!!! Please don't name VIs with "FINAL" when they clearly aren't finalized…

I don't have much time right now but here's a quick and dirty option. I'd recommend using an .ini file. You don't have to worry about string handling or file locations or anything like that, you just record the last value to the file, then read it back later. Now, if you want to append a new line every so often so you can track pump usage over time, that's a different question. For that case I think I'd use "Read delimited spreadsheet" and take the last row to initialize your program and just keep something like what you have now, just appending to the end each time it runs.

Saving and Restoring Pump Operating Hours in LabVIEW

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Can you send me your file, I'm having some trouble finding some items

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I managed to complete the logic you sent me, tomorrow I will test it in the field, even so, thank you very much for the help and tips.

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My friends, thank you for your full support. This logic worked perfectly.

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Saving and Restoring Pump Operating Hours in LabVIEW

Re: Saving and Restoring Pump Operating Hours in LabVIEW

Re: Saving and Restoring Pump Operating Hours in LabVIEW

Re: Saving and Restoring Pump Operating Hours in LabVIEW